.md-area
  .md-header
    %ul.nav-links.clearfix
      %li.active
        %a.js-md-write-button{ href: "#md-write-holder", tabindex: -1 }
          编写
      %li
        %a.js-md-preview-button{ href: "#md-preview-holder", tabindex: -1 }
          预览
      %li.pull-right
        %button.zen-control.zen-control-full.js-zen-enter{ type: 'button', tabindex: -1 }
          转到全屏

  .md-write-holder
    = yield
  .md.md-preview-holder.js-md-preview.hide{class: (preview_class if defined?(preview_class))}

  - if defined?(referenced_users) && referenced_users
    %div.referenced-users.hide
      %span
        = icon('exclamation-triangle')
        你添加了
        %strong
          %span.js-referenced-users-count 0
          人
        到此讨论。请谨慎行事。
